import type {
  DossierCameraPreset,
  DossierThumbnailStrategy,
  DossierVector3,
} from './types';

const add = (origin: DossierVector3, dx: number, dy: number, dz: number): DossierVector3 => [
  origin[0] + dx,
  origin[1] + dy,
  origin[2] + dz,
];

export const makeCameraPresets = (
  radius: number,
  target: DossierVector3,
  detail: Pick<DossierCameraPreset, 'id' | 'label' | 'position' | 'target' | 'description'>,
): readonly DossierCameraPreset[] => [
  {
    id: 'front',
    label: 'Front',
    position: add(target, 0, radius * 0.18, radius),
    target,
    description: 'Orthographic-feeling front reference angle for identifying the major assemblies.',
    lensMm: 55,
  },
  {
    id: 'back',
    label: 'Back',
    position: add(target, 0, radius * 0.18, -radius),
    target,
    description: 'Rear reference angle for output shafts, exhaust paths, and hidden service details.',
    lensMm: 55,
  },
  {
    id: 'left',
    label: 'Left',
    position: add(target, -radius, radius * 0.2, 0),
    target,
    description: 'Left-side engineering elevation for examining longitudinal relationships.',
    lensMm: 55,
  },
  {
    id: 'right',
    label: 'Right',
    position: add(target, radius, radius * 0.2, 0),
    target,
    description: 'Right-side engineering elevation for examining ports, drive paths, and linkages.',
    lensMm: 55,
  },
  {
    id: 'top',
    label: 'Top',
    position: add(target, 0, radius, radius * 0.02),
    target,
    description: 'Top-down layout view for tracing flow paths and component symmetry.',
    lensMm: 65,
  },
  {
    id: 'isometric',
    label: 'Isometric',
    position: add(target, radius * 0.82, radius * 0.58, radius * 0.82),
    target,
    description: 'Premium catalogue view used for thumbnails, tours, and reset state.',
    lensMm: 45,
  },
  {
    ...detail,
    lensMm: 70,
  },
];

export const makeThumbnailStrategy = (
  primarySilhouette: readonly string[],
  accentParts: readonly string[],
  renderNotes: string,
  backgroundMotif = 'dark blueprint grid, radial accent glow, subtle ambient-occlusion contact shadow',
): DossierThumbnailStrategy => ({
  cameraPresetId: 'isometric',
  primarySilhouette,
  accentParts,
  backgroundMotif,
  renderNotes,
});